Hair roller



FIG. 1 is a perspective view of a hair roller showing my new design;

FIG. 2 is a side view of the hair roller;

FIG. 3 is an end view;

FIG. 4 is a perspective view of the hair roller in an alternateposition;

FIG. 5 is a perspective view thereof in another position; and

FIG. 6 is a perspective view thereof in yet another position.

The ornamental design for a hair roller, as shown and described.